Sleep support device



FIG. 1 is a front perspective view of a sleep support device, showing our new design;

FIG. 2 is a front plan view;

FIG. 3 is a side elevational view, the opposite side being a mirror image thereof;

FIG. 4 is a left end elevational view thereof; and,

FIG. 5 is a right end elevational view thereof.

The rear of the article is not part of the claimed design. 

The ornamental design for a sleep support device, as shown and described. 